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HackbookAppDelegate.m
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HackbookAppDelegate.m
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/*
* Copyright 2010 Facebook
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "HackbookAppDelegate.h"
#import "RootViewController.h"
#import "DataSet.h"
// Your Facebook APP Id must be set before running this example
// See http://www.facebook.com/developers/createapp.php
// Also, your application must bind to the fb[app_id]:// URL
// scheme (substitue [app_id] for your real Facebook app id).
static NSString* kAppId = @"210849718975311";
@implementation HackbookAppDelegate
@synthesize window=_window;
@synthesize navigationController=_navigationController;
@synthesize facebook;
@synthesize apiData;
@synthesize userPermissions;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Setup view controllers
RootViewController *rootViewController = [[RootViewController alloc] init];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:rootViewController];
[navController.navigationBar setTintColor:[UIColor colorWithRed:0/255.0
green:51.0/255.0
blue:102.0/255.0
alpha:1.0]];
[navController.navigationBar setBarStyle:UIBarStyleBlackTranslucent];
self.navigationController = navController;
[rootViewController release];
[navController release];
// Initialize Facebook
facebook = [[Facebook alloc] initWithAppId:kAppId andDelegate:rootViewController];
// Check and retrieve authorization information
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"]) {
facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
}
// Initialize API data (for views, etc.)
apiData = [[DataSet alloc] init];
// Initialize user permissions
userPermissions = [[NSMutableDictionary alloc] initWithCapacity:1];
// Override point for customization after application launch.
// Add the navigation controller's view to the window and display.
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
// Check App ID:
// This is really a warning for the developer, this should not
// happen in a completed app
if (!kAppId) {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:@"Setup Error"
message:@"Missing app ID. You cannot run the app until you provide this in the code."
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil,
nil];
[alertView show];
[alertView release];
} else {
// Now check that the URL scheme fb[app_id]://authorize is in the .plist and can
// be opened, doing a simple check without local app id factored in here
NSString *url = [NSString stringWithFormat:@"fb%@://authorize",kAppId];
BOOL bSchemeInPlist = NO; // find out if the sceme is in the plist file.
NSArray* aBundleURLTypes = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleURLTypes"];
if ([aBundleURLTypes isKindOfClass:[NSArray class]] &&
([aBundleURLTypes count] > 0)) {
NSDictionary* aBundleURLTypes0 = [aBundleURLTypes objectAtIndex:0];
if ([aBundleURLTypes0 isKindOfClass:[NSDictionary class]]) {
NSArray* aBundleURLSchemes = [aBundleURLTypes0 objectForKey:@"CFBundleURLSchemes"];
if ([aBundleURLSchemes isKindOfClass:[NSArray class]] &&
([aBundleURLSchemes count] > 0)) {
NSString *scheme = [aBundleURLSchemes objectAtIndex:0];
if ([scheme isKindOfClass:[NSString class]] &&
[url hasPrefix:scheme]) {
bSchemeInPlist = YES;
}
}
}
}
// Check if the authorization callback will work
BOOL bCanOpenUrl = [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString: url]];
if (!bSchemeInPlist || !bCanOpenUrl) {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:@"Setup Error"
message:@"Invalid or missing URL scheme. You cannot run the app until you set up a valid URL scheme in your .plist."
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil,
nil];
[alertView show];
[alertView release];
}
}
return YES;
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
// Although the SDK attempts to refresh its access tokens when it makes API calls,
// it's a good practice to refresh the access token also when the app becomes active.
// This gives apps that seldom make api calls a higher chance of having a non expired
// access token.
[[self facebook] extendAccessTokenIfNeeded];
}
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
return [self.facebook handleOpenURL:url];
}
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
return [self.facebook handleOpenURL:url];
}
- (void)dealloc {
[_window release];
[_navigationController release];
[facebook release];
[apiData release];
[userPermissions release];
[super dealloc];
}
#pragma mark - UIAlertViewDelegate methods
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
// Quit the app
exit(1);
}
@end